package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetMealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;


    /**
     * 新增套餐
     *
     * @param setmealDTO
     */
    @Transactional
    public void saveSetmeal(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.insert(setmeal);
        Long id = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (!setmealDishes.isEmpty() && setmealDishes.size() > 0) {
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(id);
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 套餐分页查询
     *
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据id查询套餐
     *
     * @param id
     * @return
     */
    public SetmealVO getById(Long id) {
        Setmeal setmeal = setmealMapper.getByid(id);
        List<SetmealDish> list = setmealDishMapper.getById(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(list);
        return setmealVO;
    }

    /**
     * 修改套餐
     *
     * @param setmealDTO
     */
    @Transactional
    public void updateSetmeal(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.update(setmeal);

        setmealDishMapper.deleteBySetmealId(setmealDTO.getId());

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        if (!setmealDishes.isEmpty() && setmealDishes.size() > 0) {
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmeal.getId());
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 套餐起售、停售
     *
     * @param status
     * @param id
     */
    public void stopWithStart(Integer status, Long id) {
        Setmeal setmeal = new Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);
        if (status == StatusConstant.ENABLE) {
            List<Dish> list = dishMapper.getBySetmealId(id);
            if (!list.isEmpty() && list.size() > 0) {
                for (Dish dish : list) {
                    if (dish.getStatus() == StatusConstant.DISABLE) {
                        throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }
            }
        }
        setmealMapper.update(setmeal);

    }

    /**
     * 批量删除套餐
     *
     * @param ids
     */
    @Transactional
    public void deleteByIds(List<Long> ids) {
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getByid(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        //直接编写批量删除
        setmealMapper.deleteByIds(ids);
        //通过for循环来删
        for (Long id : ids) {
            setmealDishMapper.deleteBySetmealId(id);
        }

    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
